Generally, it's good practice to keep at least one previous kernel around when installing a new one, in case you find problems after the initial succesful boot with the new kernel. For example, an updated driver in the new kernel could cause instability under circumstances that only crop up after some time and lead you to reboot into the older one until a fixed version is released.
-- should warn at partitioning stage if /boot is on XFS https://launchpad.net/bugs/47848 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
